ADSP-21375 EZ-KIT Lite Evaluation System Manual
2-5
ADSP-21375 EZ-KIT Lite Hardware Reference
To use the DAI for a different purpose, disable any signal driving the DAI
pin with a switch (see
“Codec Setup Switch (SW3)” on page 2-11
addition, the
SW3
switch allows flexible routing of the 12.288 MHz audio
oscillator’s output signal. By default, this signal is used as the master clock
(
MCLK
) for the AD1835A codec.
All of the DAI signals are available externally via the expansion interface
connectors (
J1–3
), as well as the 0.1” spaced header
P4
. The pinout of the
connectors can be found in
“ADSP-21375 EZ-KIT Lite Schematic” on
DPI Interface
The digital peripheral interface (DPI) pins connect to a second signal
routing unit of the processor (
SRU2
). The
SRU2
unit, similar to the
SRU
, is a
flexible routing system, providing a large system of signal flows within the
processor. In general, the
SRU2
allows to route the DPI pins to different
internal peripherals in various combinations.
Figure 2-3. DPI Connections Block Diagram
DPI1 (MOSI)
DPI2 (MISO)
DPI3 (SPICLK)
DPI4 (SPI_AD1835CS)
DPI5 (SPI_FLASHCS)
DPI6 (LED1)
DPI7 (LED2)
DPI8 (LED3)
DPI13 (LED4)
DPI14 (LED5)
DPI9 (UART TX)
DPI10 (UART RX)
DPI12 (UART CTS)
DPI11 (UART RTS)
LED1
LED2
LED3
LED4
LED5
AD1835
SPI
FLASH
CLATCH
CCLK
COUT
CIN
CS/
SCK
SO
SI
ADSP-21375
T2IN
R2OUT
R1OUT
T1IN
T2OUT
R2IN
R1IN
T1OUT
ADM3202
DB-9
Conn